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Water reducing agent especially for subway segments and preparation method of same

A technology of subway segment and water reducing agent, which is used in underground chambers, mining equipment, shaft equipment, etc., can solve the problems of high strength grade, high dosage, high concrete viscosity, etc., and achieves improved performance, workability improvement, The effect of improved appearance quality

Inactive Publication Date: 2017-07-14
萧县沃德化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the segment was produced, due to a series of reasons such as high strength grade, high amount of cementitious material, low water-binder ratio, steel mold, construction technology, etc., the problems of high viscosity of concrete and large air bubbles in concrete are difficult to eliminate, thus Seriously affected the appearance quality of the segments

Method used

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  • Water reducing agent especially for subway segments and preparation method of same
  • Water reducing agent especially for subway segments and preparation method of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A special water reducing agent for subway segments, which is characterized in that it is made of the following components: 27% water-reducing polycarboxylate mother liquor, 6% slump-preserving polycarboxylate mother liquor, and 2% viscosity-reducing additive , workability regulator 2.8%, foam control agent 0.09%, water 62.11%.

[0018] The preparation method of the subway segment: add two kinds of water reducer mother liquids into a four-necked flask, stir for 5 minutes, add high-carbon alcohol polyether ester foam control agent, stir for another 15 minutes, then add water with a total water mass of 55% and stir for 5 minutes , then add the workability modifier at a uniform speed, stir for 15 minutes, then add the viscosity reducing agent at a uniform speed and stir for 10 minutes, finally add the remaining water, and stir for 10 minutes to obtain the finished product.

[0019] Among them, the workability regulator is a mixture of potassium sulfate, sodium sulfate, and ...

Embodiment 2

[0021] A special water reducing agent for subway segments, which is characterized in that it is made of the following components: 30% water-reducing polycarboxylate mother liquor, 5% slump-preserving polycarboxylate mother liquor, and 1.5% viscosity-reducing additive , Workability regulator 3%, foam control agent 0.07%, water 60.43%.

[0022] The preparation method of the subway segment: add two kinds of water reducer mother liquors into a four-necked flask, stir for 10 minutes, add high-carbon alcohol polyether ester foam control agent, stir for another 20 minutes, then add water with a total water mass of 55% and stir for 5 minutes , then add the workability modifier at a uniform speed, stir for 15 minutes, then add the viscosity reducing agent at a uniform speed and stir for 15 minutes, finally add the remaining water, and stir for 10 minutes to obtain the finished product.

[0023] Among them, the workability regulator is a mixture of potassium sulfate, sodium sulfate, and...

Embodiment 3

[0025] A special water reducing agent for subway segments, which is characterized in that it is made of the following components: 28% water-reducing polycarboxylate mother liquor, 9% slump-preserving polycarboxylate mother liquor, and 2.5% viscosity-reducing additive , workability regulator 2%, foam control agent 0.1%, water 58.4%.

[0026] The preparation method of the subway segment: add two kinds of water reducer mother liquors into a four-necked flask, stir for 10 minutes, add high-carbon alcohol polyether ester foam control agent, stir for another 20 minutes, then add water with a total water mass of 55% and stir for 5 minutes , then add the workability modifier at a uniform speed, stir for 20 minutes, then add the viscosity reducing agent at a uniform speed and stir for 10 minutes, finally add the remaining water, and stir for 10 minutes to obtain the finished product.

[0027] Among them, the workability regulator is a mixture of potassium sulfate, sodium sulfate, and s...

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Abstract

The invention provides a water reducing agent especially for subway segments and a preparation method of same. The water reducing agent is composed of: 20-30% of a water reducing type polycarboxylic acid mother liquid, 5-9% of a slump retaining type polycarboxylic acid mother liquid, 1.5-2.8% of a viscosity reducing additive, 2-4% of a workability regulator, 0.07-0.12% of a foam controlling agent, and the balanced being water. The water reducing agent is prepared through a stepwise mixing method on the basis of reasonable raw material formula. The water reducing agent can greatly reduce the viscosity of concrete and eliminate large bubbles in the concrete, so that produced subway segments are significantly improved in appearance quality.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a special water reducer for subway segments and a preparation method thereof. Background technique [0002] In recent years, with the acceleration of urbanization and the introduction and promotion of shield construction technology, subway projects in major cities have also started one after another, and the prefabrication of subway segments has also entered a peak period. Subway segment is a high-quality work in concrete products. Compared with ordinary cement products, it has: 1) the outer shape is arc-shaped, usually assembled into a ring by six pieces; 2) high strength and high impermeability; 3) dimensional accuracy requirements high. However, since the production of the segment, due to a series of reasons such as high strength grade, high amount of cementitious material, low water-binder ratio, steel mold, construction technology, etc., the problems of high visc...

Claims

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Application Information

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IPC IPC(8): C04B24/32C04B24/42E21D11/08C04B103/30
CPCC04B40/0046C04B2103/302E21D11/08C04B24/32C04B24/24C04B22/147C04B22/10C04B24/42
Inventor 宋宝马丽涛崔岩杨道顺
Owner 萧县沃德化工科技有限公司
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